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RFC 9843
Title: IGP Flexible Algorithms: Bandwidth, Delay,
Metrics, and Constraints
Author: S. Hegde,
W. Britto,
R. Shetty,
B. Decraene,
P. Psenak,
T. Li
Status: Standards Track
Stream: IETF
Date: September 2025
Mailbox: [email protected],
[email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Pages: 33
Updates: RFC 9350
I-D Tag: draft-ietf-lsr-flex-algo-bw-con-22.txt
URL: https://www.rfc-editor.org/info/rfc9843
DOI: 10.17487/RFC9843
Many networks configure the IGP link metric relative to the link
capacity, and high bandwidth traffic gets routed per the link
capacity. Flexible Algorithms provide mechanisms to create
constraint-based paths in an IGP. This specification documents a
generic metric-type and a set of bandwidth-related constraints to be
used in Flexible Algorithms.
This document updates RFC 9350.
This document is a product of the Link State Routing Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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